too much punctuation

Author: beverlylytle

src/compas/robots/model/robot.py

@@ -858,7 +858,7 @@ def add_link(self, name, visual_meshes=None, visual_color=None, collision_meshes
             The link's visual mesh.
         visual_color : list of 3 float, optional
             The rgb color of the mesh. Defaults to (0.8, 0.8, 0.8)
-        collision_meshes : list of :class:`compas.datastructures.Mesh` or :class:`compas.geometry.Shape`,, optional
+        collision_meshes : list of :class:`compas.datastructures.Mesh` or :class:`compas.geometry.Shape`, optional
             The link's collision mesh.
 
         Returns